test: Add a testcase for the global termminate handler

test/global-terminate.cpp

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2020 Liu Hao
+ *
+ * This file is part of llvm-mingw.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#include <exception>
+#include <stdio.h>
+#include <stdlib.h>
+
+void whoa() {
+    ::puts("whoa!");  // expected output
+    ::exit(0);
+}
+
+int main(int argc, char *argv[]) {
+#ifdef __aarch64__
+    // This test succeeds with latest mingw-w64 (since 9718ecee1b95, Sept
+    // 2020) and latest clang (since 20f7773bb4bb458, Sept 2020, on the
+    // clang 12.0 branch), but fails before that.
+    // Additionally it uses the __C_specific_handler function, which
+    // isn't implemented in wine for aarch64 yet.
+    return 0;
+#else
+    ::std::set_terminate(whoa);
+    throw 42;
+#endif
+}